Seiko Cal. 6634 - 991

This Quartz model from 1966 features a 36mm Stainless Steel case. Powered by the 6634 caliber with 25j jewels beating at 21,600 bph, it delivers a 66 hours power reserve. [seikata-wm-467934acc674]

Also known as: Monster, Sportsmatic

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

11.2mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

200m

Dial Color

Cream

Jewels

25j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1966

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